HOA Affordability Calculator accuracy and testing

Formula source

• Housing budget = monthly income x target ratio. Maximum HOA = budget - other housing costs. Housing ratio = total housing cost / income.

Test cases

Known limitations

• This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
• Use the result as a planning estimate unless the calculator page states a stricter purpose.

Assumptions

• All prices, rates, taxes, and usage values are entered by the user.
• Calculations run locally in your browser and are not stored by Calwarden.
• This is planning math, not financial, tax, engineering, or legal advice.

Unit handling

• Gross Monthly Income accepts values in $.
• Target Housing Ratio accepts values in %.
• Mortgage Payment accepts values in $/mo.
• Property Tax accepts values in $/mo.
• Insurance accepts values in $/mo.
• HOA Dues accepts values in $/mo.
• Other Housing Costs accepts values in $/mo.
• Maximum HOA at Target is displayed as currency.
• Total Housing Cost is displayed as currency.
• Housing Ratio is displayed as a percentage.

Rounding rules

• Number displays use up to 2 decimal places in the calculator UI.
• Currency outputs are displayed with standard US dollar formatting.
• Percent outputs are displayed with two decimal places.
• Input precision follows configured step values where provided.

Version history

Change log